Description
E5LA HENF105296R0001 is an electronic overcurrent relay from ABB’s Emax series, specifically designed for low-voltage distribution protection in industrial and commercial electrical systems. Below is a detailed introduction to this product:
E5LA HENF105296R0001 ABB current relay
I. Product Overview
- Model: E5LA HENF105296R0001
- Type: Electronic overcurrent relay
- Application Areas: Low-voltage distribution protection in industrial and commercial electrical systems
II. Product Features
- Analog/Digital Hybrid Thermal-Magnetic Trip Unit: This device combines analog and digital technologies to provide high-precision protection for feeders, motors, transformers, and busbars against overloads, short circuits, and ground faults with minimal maintenance requirements.
- LSI Protection Functions: It includes Long-time (L), Short-time (S), and Instantaneous (I) protection functions, offering adjustable settings for overload (thermal), short-circuit delay (time-delayed magnetic), and instantaneous fault clearing. Notably, this variant does not include ground fault (G) protection, distinguishing it from LSIG models.
- Self-Powered Design: It operates on an auxiliary voltage generated by the main current (via internal current transformers), eliminating the need for external control power. This is a critical advantage in backup generator or island grid scenarios.
- Manual Adjustment Settings: Settings such as rated current (Ir), long-time delay (tr), short-time pickup (Isd), and short-time delay (tsd) can be manually adjusted via dials on the front panel, with clear scales for easy operation.
- Trip Indication: The trip indication is a mechanically locked flag that operates post-trip, allowing maintenance personnel to quickly identify the trip cause (overload vs. short circuit) without electronic diagnostics.
- Robust and Durable: Designed for DIN rail or direct circuit breaker mounting, it can withstand high electromagnetic interference, temperature fluctuations, and vibrations, making it ideal for critical power infrastructure.
III. Technical Specifications
- Complete Part Number: HENF105296R0001
- Manufacturer: ABB
- Compatible Equipment: Electronic trip unit for Emax E5 type air circuit breakers
- Adjustable Setting Ranges:
- Rated current (Ir): 0.4-1.0×In
- Long-time delay (tr): 3-30s
- Short-time pickup (Isd): 1.5-10×In
- Short-time delay (tsd): 0.1-0.4s
- Installation Method: Integrated into the Emax E5 ACB frame
- Compliance Standards: IEC 60947-2, UL 489, CSA
IV. Application Scenarios
E5LA HENF105296R0001 is typically used in industries where electrical continuity directly impacts operational safety or regulatory compliance, such as:
- Hospitals: Protecting emergency distribution feeders to ensure life-support circuits remain energized unless a true fault occurs.
- Mining Operations: Protecting mobile substation outputs against cable faults in humid, high-vibration environments.
- Marine Vessels: Its resistance to salt corrosion and independence from shipboard DC control voltages make it ideal for main switchboard applications.
